Have you ever thought about getting checked out why you cramp so bad and have such a hard time when the TOM comes around. I use to have a really hard time every month and the dr. told me their are procedures to help.
I ended up having a hysterctomy but there are things they can do for you.
I know it's no fun that time of the month. If it were me I wouldnt exercise during that time, it seems to make it worse. I sure hope you feel better..